Perfection is what Derek Lowe thought he had to show to win a job in the Texas Rangers’ bullpen. Lowe did that in his opening eight innings before he admittedly had a “disastrous” inning. He gave up four home runs and six runs in his scheduled fourth inning against the Angels last Thursday. But the Rangers didn’t hold that inning against Lowe. Instead, they saw enough from the 39-year-old veteran to want him in the bullpen as their long man and spot starter, similar to the role Scott Feldman filled last season. “You always like someone who has proven he can get outs at the major league level and he has done that in his career,” manager Ron Washington said. For Lowe, who pitched 1 2/3 scoreless innings Tuesday, it’s quite an accomplishment. The 16-year veteran will be pitching in the majors in a season he’ll turn 40, and ranks making the team up there with all of his accolades. Lowe was throwing batting practice to his son’s youth-league team, and long-tossing and throwing bullpen sessions at nearby Florida Gulf Coast University before signing with the Rangers on March 6. “I came into this knowing you couldn’t give up a run,” Lowe said. “That’s the way I came into this camp. I think if my fourth inning [Thursday] would have happened in my first game, I don’t think I’m here. You had to come in and make an instant impression and have competitive innings every time out. “For me personally, it’s a pretty big accomplishment. Now you’ve got to go prepare for the season.”